jump to pages in a scrollview that is using UIPagecontrol

Question

I have UIScrollview that contains different UITableviews. You can scroll through these UITableviews using a UIPagecontrol.

This is how I add my UITableview to the UIScrollview

- (void)loadPage:(NSInteger)page {
    if (page < 0 || page >= self.pageStages.count) {
        // If it's outside the range of what we have to display, then do nothing
        return;
    }

    // Load an individual page, first seeing if we've already loaded it
    UIView *pageView = [self.pageViews objectAtIndex:page];
    if ((NSNull*)pageView == [NSNull null]) {
        CGRect frame = self.scrollView.bounds;
        //frame.size.width = 280.0f;
        frame.size.height = self.scrollView.bounds.size.height;

        float offset=20;
        frame.size.width = frame.size.width-(2*offset);
        frame.origin.x = (326 * page)+offset;
        frame.origin.y = 0;


        UITableView *tableStage = [[UITableView alloc]initWithFrame:frame];
        tableStage.backgroundColor = [UIColor colorWithRed:(250/255.0) green:(248/255.0) blue:(247/255.0) alpha:100];
        tableStage.contentMode = UIViewContentModeScaleAspectFit;
        tableStage.delegate = self;
        tableStage.dataSource = self;
        tableStage.tag = page;

        tableStage.contentMode = UIViewContentModeScaleAspectFit;
        [self.scrollView addSubview:tableStage];
        [self.pageViews replaceObjectAtIndex:page withObject:tableStage];
    }
}

Now I want that user can jump to a certain UITableview from another UIViewController. Therefore I have a variable pageNumber. When I set the pageNumber I call a method jumpToPage3 and I give the pageNumber with it. This is how the function looks like.

-(void)jumpToPage3:(NSNumber *)page{
    NSLog(@"jump to page 3");
    float offset=30;
    float height = self.scrollView.bounds.size.height;
    float width = 320 - (2*offset);
    int pagee = [page intValue] - 1;
    float x  = (320 * pagee) + offset;
    [self.scrollView scrollRectToVisible:CGRectMake(x, 0, width , height) animated:NO];
}

The problem is that it is not jumping to the correct page. It stays on the first page.

Can someone help me with this?

your code seems fine. Where you call this method jump to page3? is the page value correct? id pagee is 0 the scroll view will not scroll — Alex Terente, Jun 21 '13 at 07:33
@Stef Geelen- See the value of "x" in NSLog...whats it is....? — Vivek Sehrawat, Jun 21 '13 at 07:35
Here is what I get from my log of x and page --> Page is 2 and x is 670.000000 — Steaphann, Jun 21 '13 at 07:48
http://stackoverflow.com/questions/1446536/uiscrollview-works-as-expected-but-scrollrecttovisible-does-nothing Hope to help you! — Nguyen Thi Thuy Trang, Jun 21 '13 at 08:15

score 0 · Answer 1 · answered Jun 21 '13 at 07:57

0

When you add content to the scroll view you also have to tell increase the contentSize

answered Jun 21 '13 at 07:57

Alex Terente

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But my contentsize is oké I think ? Because when I just open the viewcontroller. I can swipe between the tableviews. the problem is only occuring when I jump to a page. – Steaphann Jun 21 '13 at 08:04
pass a hardcoded value to scrollRectToVisible: something like 800,0,1,1 and see what happens. Is your scroll view allocated and properly initialized when you call jumpToPage3? – Alex Terente Jun 21 '13 at 10:08

jump to pages in a scrollview that is using UIPagecontrol

1 Answers1